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2025-07-01 - 04:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackaslot5s.osadl.org (updated Tue Jul 01, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81890,0rcu_preempt23904-21kworker/0:023:06:540
81790,0rcu_preempt19776-21ping19:27:300
81650,0rcu_preempt19-21ksoftirqd/123:37:321
81610,0rcu_preempt54-21kswapd021:53:440
81600,0rcu_preempt26374-21php-cgi21:09:491
81600,0rcu_preempt19-21ksoftirqd/123:42:161
81580,0rcu_preempt3-21ksoftirqd/019:32:200
81570,0rcu_preempt19-21ksoftirqd/122:53:561
81560,0rcu_preempt3-21ksoftirqd/022:07:070
81550,0rcu_preempt19-21ksoftirqd/123:06:541
81550,0rcu_preempt19-21ksoftirqd/122:18:581
9950540,0irq/345-4848400181ktimersoftd/121:57:101
81540,0rcu_preempt19-21ksoftirqd/119:51:541
81540,0rcu_preempt19-21ksoftirqd/119:47:051
10050540,0irq/346-48484001397-1kworker/0:2H22:02:140
81530,0rcu_preempt19-21ksoftirqd/100:32:551
81530,0rcu_preempt19-21ksoftirqd/100:11:411
10050530,0irq/346-48484006356-1kworker/0:0H23:27:010
81520,0rcu_preempt19-21ksoftirqd/123:27:171
81520,0rcu_preempt19-21ksoftirqd/123:25:021
81520,0rcu_preempt19-21ksoftirqd/100:21:541
10050520,0irq/346-484840012052-1kworker/0:0H00:15:310
81510,0rcu_preempt19-21ksoftirqd/121:17:131
81510,0rcu_preempt1115-21df_abs23:57:081
81510,0rcu_preempt1115-21df_abs23:57:081
10050510,0irq/346-484840030019-1kworker/0:2H22:34:120
10050510,0irq/346-484840018658-1kworker/0:1H00:20:120
10050510,0irq/346-484840010090-1kworker/0:1H22:12:270
81500,0rcu_preempt3-21ksoftirqd/022:42:090
81500,0rcu_preempt19-21ksoftirqd/119:07:171
81500,0rcu_preempt0-21swapper/121:27:201
81490,0rcu_preempt19-21ksoftirqd/120:57:231
10050490,0irq/346-48484000-21swapper/021:43:090
81480,0rcu_preempt19-21ksoftirqd/122:07:191
81480,0rcu_preempt19-21ksoftirqd/121:47:061
81480,0rcu_preempt16496-21cyclictest22:50:241
81480,0rcu_preempt1399-1kworker/1:4H22:23:431
10050480,0irq/346-48484004398-21munin-node0
10050480,0irq/346-484840031358-21ssh23:15:020
9950470,0irq/345-48484003-21ksoftirqd/021:11:550
9950470,0irq/345-48484000-21swapper/122:02:221
9950470,0irq/345-48484000-21swapper/019:16:540
81470,0rcu_preempt3-21ksoftirqd/019:41:090
81470,0rcu_preempt3-21ksoftirqd/019:18:160
81470,0rcu_preempt3-21ksoftirqd/019:04:340
81470,0rcu_preempt19-21ksoftirqd/120:06:541
81470,0rcu_preempt19-21ksoftirqd/100:17:081
10050470,0irq/346-484840018602-21ssh23:38:340
10050470,0irq/346-484840018262-1kworker/0:1H23:02:160
9950460,0irq/345-484840030503-1kworker/0:1H23:19:240
9950460,0irq/345-484840026589-1kworker/0:2H00:35:380
9950460,0irq/345-484840023489-21diskmemload21:47:220
81460,0rcu_preempt3-21ksoftirqd/019:23:350
81460,0rcu_preempt23489-21diskmemload22:42:271
81460,0rcu_preempt19-21ksoftirqd/122:32:091
81460,0rcu_preempt16496-21cyclictest23:12:091
81460,0rcu_preempt10497-21apt-get20:27:071
10050460,0irq/346-48484003051-21ssh22:40:500
10050460,0irq/346-484840027333-21ssh00:30:120
10050460,0irq/346-48484001534-21ssh21:18:430
9950450,0irq/345-484840011715-1kworker/0:1H20:47:210
9950450,0irq/345-48484000-21swapper/022:30:200
9950450,0irq/345-48484000-21swapper/021:07:220
10050450,0irq/346-484840025758-21munin-node0
10050450,0irq/346-484840022216-1kworker/0:1H21:57:160
10050450,0irq/346-484840014164-1kworker/0:2H22:57:140
10050450,0irq/346-484840010395-21ssh21:30:080
9950440,0irq/345-484840054-21kswapd023:52:170
81440,0rcu_preempt19-21ksoftirqd/122:12:181
10050440,0irq/346-484840018678-1kworker/0:0H23:42:090
10050440,0irq/346-484840018658-1kworker/0:1H00:22:220
10050440,0irq/346-48484001699migration/122:31:201
10050440,0irq/346-484840016495-21munin-node0
10050440,0irq/346-484840015737-21ssh22:56:150
9950430,0irq/345-48484001355-21ssh23:57:130
9950430,0irq/345-48484001355-21ssh23:57:130
81430,0rcu_preempt27025-21ssh00:29:381
81430,0rcu_preempt24975-21apt-get23:47:071
81430,0rcu_preempt19-21ksoftirqd/122:37:401
81430,0rcu_preempt19-21ksoftirqd/121:42:201
10050430,0irq/346-48484007548-1kworker/0:0H19:07:120
10050430,0irq/346-48484005893-1kworker/0:0H22:50:530
10050430,0irq/346-484840032625-1kworker/0:3H19:57:200
10050430,0irq/346-484840032625-1kworker/0:3H19:57:200
10050430,0irq/346-484840016199-21munin-node0
10050430,0irq/346-48484000-21swapper/023:35:230
81420,0rcu_preempt4821-21ssh21:22:251
81420,0rcu_preempt19-21ksoftirqd/123:02:141
81420,0rcu_preempt19-21ksoftirqd/120:32:141
81420,0rcu_preempt19-21ksoftirqd/120:06:541
81420,0rcu_preempt19-21ksoftirqd/119:32:381
81420,0rcu_preempt0-21swapper/120:52:131
81420,0rcu_preempt0-21swapper/120:37:121
1599420,0migration/03745-21taskset20:06:390
10050420,0irq/346-48484006689-1kworker/0:2H20:27:160
10050420,0irq/346-484840054-21kswapd021:12:121
10050420,0irq/346-484840016141-21rm22:17:120
10050420,0irq/346-484840011437-1kworker/0:1H21:32:270
9950410,0irq/345-48484000-21swapper/020:52:100
9950410,0irq/345-48484000-21swapper/000:07:210
81410,0rcu_preempt19-21ksoftirqd/119:36:551
81410,0rcu_preempt16462-21aten_rapower_en22:57:081
81410,0rcu_preempt12296-21ssh21:32:181
10050410,0irq/346-48484008442-1kworker/0:3H20:22:180
10050410,0irq/346-484840032625-1kworker/0:3H19:56:530
9950400,0irq/345-48484004450-21ssh23:22:060
9950400,0irq/345-484840032552-21ping20:10:560
9950400,0irq/345-484840018151-1kworker/1:0H21:41:151
9950400,0irq/345-484840012952-21sort20:32:230
81400,0rcu_preempt30160-21timerwakeupswit23:52:231
81400,0rcu_preempt2263-21ssh23:18:401
81400,0rcu_preempt22003-21cat19:22:181
81400,0rcu_preempt19-21ksoftirqd/123:32:131
81400,0rcu_preempt19-21ksoftirqd/121:52:101
81400,0rcu_preempt19-21ksoftirqd/120:22:151
81400,0rcu_preempt19-21ksoftirqd/120:12:291
10050400,0irq/346-484840030003-1kworker/0:1H19:47:220
10050400,0irq/346-484840021501-1kworker/0:1H21:01:530
10050400,0irq/346-48484001871-1kworker/0:1H20:17:150
10050400,0irq/346-484840014620-21ls20:37:200
10050400,0irq/346-48484000-21swapper/022:22:230
9950390,0irq/345-48484000-21swapper/000:05:190
81390,0rcu_preempt19776-21ping19:31:261
81390,0rcu_preempt19-21ksoftirqd/119:02:141
10050390,0irq/346-48484005747-21dropbear20:12:120
10050390,0irq/346-484840019776-21ping19:42:360
81380,0rcu_preempt19-21ksoftirqd/119:57:201
81380,0rcu_preempt19-21ksoftirqd/119:57:201
81380,0rcu_preempt19-21ksoftirqd/119:20:041
81380,0rcu_preempt0-21swapper/100:02:461
10050380,0irq/346-484840022586-21meminfo21:02:180
10050380,0irq/346-484840014126-21ssh00:13:231
81370,0rcu_preempt19776-21ping19:41:571
81370,0rcu_preempt19-21ksoftirqd/121:02:221
81370,0rcu_preempt19-21ksoftirqd/119:12:031
81370,0rcu_preempt0-21swapper/120:49:461
81350,0rcu_preempt19-21ksoftirqd/120:17:131
81340,0rcu_preempt0-21swapper/120:42:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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